[PATCH] serial uartlite driver

Add a driver for the Xilinx uartlite serial controller used in boards with
the PPC405 core in the Xilinx V2P/V4 fpgas.

The hardware is very simple (baudrate/start/stopbits fixed and no break
support).  See the datasheet for details:

	http://www.xilinx.com/bvdocs/ipcenter/data_sheet/opb_uartlite.pdf

See http://thread.gmane.org/gmane.linux.serial/1237/ for the email thread.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Olof Johansson <olof@lixom.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

MAINTAINERS

@@ -3454,6 +3454,12 @@ W:	http://oss.sgi.com/projects/xfs
 T:	git git://oss.sgi.com:8090/xfs/xfs-2.6
 S:	Supported
 
+XILINX UARTLITE SERIAL DRIVER
+P:	Peter Korsgaard
+M:	jacmet@sunsite.dk
+L:	linux-serial@vger.kernel.org
+S:	Maintained
+
 X86 3-LEVEL PAGING (PAE) SUPPORT
 P:	Ingo Molnar
 M:	mingo@redhat.com

drivers/serial/Kconfig

@@ -511,6 +511,25 @@ config SERIAL_IMX_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
+config SERIAL_UARTLITE
+	tristate "Xilinx uartlite serial port support"
+	depends on PPC32
+	select SERIAL_CORE
+	help
+	  Say Y here if you want to use the Xilinx uartlite serial controller.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called uartlite.ko.
+
+config SERIAL_UARTLITE_CONSOLE
+	bool "Support for console on Xilinx uartlite serial port"
+	depends on SERIAL_UARTLITE=y
+	select SERIAL_CORE_CONSOLE
+	help
+	  Say Y here if you wish to use a Xilinx uartlite as the system
+	  console (the system console is the device which receives all kernel
+	  messages and warnings and which allows logins in single user mode).
+
 config SERIAL_SUNCORE
 	bool
 	depends on SPARC

drivers/serial/Makefile

@@ -55,4 +55,5 @@ obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
 obj-$(CONFIG_SERIAL_SGI_IOC4) += ioc4_serial.o
 obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o
 obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o
+obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o
 obj-$(CONFIG_SERIAL_NETX) += netx-serial.o

include/linux/serial_core.h

@@ -132,6 +132,8 @@
 
 #define PORT_S3C2412	73
 
+/* Xilinx uartlite */
+#define PORT_UARTLITE	74
 
 #ifdef __KERNEL__